:root{color-scheme:dark;--bg:#080b0e;--panel:#10171c;--line:#26343d;--text:#f4f7f8;--muted:#b5c0c7;--accent:#6ee7d8;--max:920px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.68 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--accent)}header,main,footer{max-width:var(--max);margin:auto;padding:24px}.brand{font-weight:800;letter-spacing:.04em;text-decoration:none;color:var(--text)}.eyebrow{color:var(--accent);font-weight:700;text-transform:uppercase;font-size:.8rem;letter-spacing:.08em}h1{font-size:clamp(2rem,7vw,4rem);line-height:1.05;margin:.25em 0}h2{margin-top:2em;line-height:1.2}h3{line-height:1.25}.lede{font-size:1.15rem;color:var(--muted)}.card,.note{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:20px;margin:18px 0}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px}.guideList{display:grid;gap:14px}.guideList a{display:block;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:20px;text-decoration:none}.guideList b{display:block;color:var(--text);font-size:1.1rem;margin-bottom:6px}.guideList span{color:var(--muted)}nav{display:flex;gap:14px;flex-wrap:wrap;margin-top:14px}.muted{color:var(--muted)}ul,ol{padding-left:1.25rem}table{width:100%;border-collapse:collapse;margin:18px 0}th,td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:12px 10px}th{color:var(--accent)}footer{border-top:1px solid var(--line);color:var(--muted);margin-top:40px}@media(max-width:600px){header,main,footer{padding:18px}.card,.note{padding:16px}table{font-size:.94rem}}